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Re: Inefficient code in reftex-index.el

From: Stefan Monnier
Subject: Re: Inefficient code in reftex-index.el
Date: Tue, 07 Jun 2005 14:06:21 -0400
User-agent: Gnus/5.11 (Gnus v5.11) Emacs/22.0.50 (gnu/linux)

>> There is no other interface into the number of accessible match
>> strings (which might be nil) rather than
>> (/ (length (match-data t)) 2).

>     That's still pretty inefficient -- I suggest that we introduce a new
>     function `match-count' to return that number.

> Is there sufficient use for this function to justify introducing it?
> I think that most cases where this would be used, the code would
> then proceed to call match-data.

Actually the only cases I can vaguely remember using the
(/ (length (match-data)) 2) idiom didn't use the whole (match-data).
They typically used the idiom in order to know *which* subgroup matched (of
course it only works if you craft your regexp carefully).


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